Abstract
Documentation of the energy yield of a large photovoltaic (PV) system over a substantial period can be useful to measure a performance guarantee, as an assessment of the health of the system, for verification of a performance model to then be applied to a new system, or for a variety of other purposes. Although the measurement of this performance metric might appear to be straight forward, thereare a number of subtleties associated with variations in weather and imperfect data collection that complicate the determination and data analysis. A performance assessment is most valuable when it is completed with a very low uncertainty and when the subtleties are systematically addressed, yet currently no standard exists to guide this process. This report summarizes a draft methodology for anEnergy Performance Evaluation Method, the philosophy behind the draft method, and the lessons that were learned by implementing the method.
Original language | American English |
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Number of pages | 64 |
DOIs | |
State | Published - 2013 |
NREL Publication Number
- NREL/TP-5200-60628
Keywords
- energy
- photovoltaic
- test methods